MDF Spline Cutting Sled

I was flipping through a catalog the other day and happened upon a spline cutting sled that this company was selling. I really liked the design of it, so I went on their website and learned all about it, watched videos etc. The only problem was, I didn’t want to pay the (what I thought was) high price for something that I could probably make myself…not to mention I’m broke, and cheap, and have enough scrap materiel’s lying around that I can make it almost for free. I...